*{
    margin: 0;
    padding: 0;
}
input{
    outline: none;
}
a{
    text-decoration: none;
}
li{
    list-style: none;
}
button{
    margin: 0;
    padding: 0;
    border: 1px solid transparent;
    outline: none;
}
/* 头部导航条 */
#nav{
    width: 100%;
    position: fixed;
    height: 60px;
    left: 0;
    bottom: 0;
    right: 0;
    top: 0;
    color: white;
    background-color: #23262E;
}

.logo{
    font-size: 25px;
    float: left;
    padding-top: 10px;
    margin:0  10px;
}
select {
    border: solid 1px white;
    width: 150px;
    color: black;
    -moz-appearance:none;
    -webkit-appearance:none;
    padding-right: 14px;
}
/*清除ie的默认选择框样式清除，隐藏下拉箭头*/
select::-ms-expand {
    display: none;
}
.search{
    width: 200px;
    float: left;
    margin: 15px 50px;
}
.signout{
    float: right;
    margin: 12px 20px;
}
/* 侧边栏 */
#aside{
    top: 60px;
    background-color: #23262E;
    position: fixed;
    width: 200px;
    overflow-x: hidden;
    left: 0;
    z-index: 999;
    color: rgba(255,255,255,.7);
    bottom: 0;
}
.menu{
    width: 220px;
    height: 100%;
    position: relative;
    overflow-x: hidden;
}
#aside ul li {
    list-style: none;
    font-size: 17px;
    background-color: #393D49;
    transition:all 0.3s;
    text-align: center;
    line-height: 50px;
    margin-right: 1px;
}
#aside ul li:hover {
    background: #009688;
}
#aside ul li a{
    display: block;
    color: rgba(255,255,255,.7);
}
#aside ul li a:hover {
    color: #fff;
}
#aside ul li ul li{
    background: #23262E;
}
/* 内容 */
#content{
    margin-left:220px;
    margin-top:70px;
}
@media screen and (max-width:1450px){
    #content{
        overflow-x: scroll;
    }
}
table {
    border-collapse: collapse;
    width:800px;
    text-align: center;
    table-layout: fixed;
}
td a {
    border: 1px solid orangered;
    padding: 10px;
    width: 100px;
    height: 100px;
    text-decoration: none;
    color: orangered;
    border-radius: 10px;
}

td a:focus,
td a:hover {
    color: orangered;
    background-color: rgba(236, 97, 73, .05);
}

table td,
table th {
    border: 1px solid #CCE8EB;
    color: #666;
    height: 50px;
    text-align: center;
    width:150px;
    word-break: keep-all;
    /* 不换行 */
    white-space: nowrap;
    /* 不换行 */
    overflow: hidden;
    /* 内容超出宽度时隐藏超出部分的内容 */
    text-overflow: ellipsis;
    /* 当对象内文本溢出时显示省略标记(...) ；需与overflow:hidden;一起使用。*/
}
table thead th {
    text-align: center;
    background-color: #CCE8EB;
    width:150px;
}
table tr:nth-child(odd) {
    background: #fff;
}

table tr:nth-child(even) {
    background: #F5FAFA;
}